6375786985 has 4 divisors (see below), whose sum is σ = 7650944388. Its totient is φ = 5100629584.

The previous prime is 6375786983. The next prime is 6375787009. The reversal of 6375786985 is 5896875736.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 861833449 + 5513953536 = 29357^2 + 74256^2 .

It is a cyclic number.

It is not a de Polignac number, because 6375786985 - 2¹ = 6375786983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6375786983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637578694 + ... + 637578703.

It is an arithmetic number, because the mean of its divisors is an integer number (1912736097).

Almost surely, 2^6375786985 is an apocalyptic number.

It is an amenable number.

6375786985 is a deficient number, since it is larger than the sum of its proper divisors (1275157403).

6375786985 is a wasteful number, since it uses less digits than its factorization.

6375786985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275157402.

The product of its digits is 76204800, while the sum is 64.

The square root of 6375786985 is about 79848.5252525054. The cubic root of 6375786985 is about 1854.2911815878.

The spelling of 6375786985 in words is "six billion, three hundred seventy-five million, seven hundred eighty-six thousand, nine hundred eighty-five".